US Road Recycling: FHWA Standards, RAP Economics, im Market Role eo an Rejuvenators

Bwebwenato

Juun 10, 2023

Amedka ewōr an RAP eo elaptata ilo lal in. Eoon in ej etale ewi wawein an asphalt rejuvenation kōmman aorōk ilo US market im ewi wawein an ri wia ro jen ailiñ ko jet maroñ deloñ.

joñan an US RAP: Elaptata ilo lal in, ak joñan an kajerbale ej wōr wōt jikin ñan eddōklok

Amedka ewōr an RAP eo elaptata ilo lal in. Ekkar ñan Federal Highway Administration (FHWA), US ej kōmman enañin 60 million tonnes in RAP ilo juon yio, eo enañin 75% ej bar kōjerbale. Menin ej kōmman bwe US ​​en juon jikin eo elaptata an kōmman im wia RAP ilo lal in. Ak, joñan an armij ro kajerbale ewōr wōt jikin ñan kōkōmanmanlok — ilo elōn state ko, RAP ej bed wot ilo 20-30%, ilo ien eo 60%+ ej maroñ in kōmmane. Men ko rej bōbrae an kalaplok RAP rejjab technical ak rej institutional im economic: moktata, joñan technical ko rejjab jimwe ibelakin state ko, ippāñ jet state ko rej bōk joñan high-RAP rej lor wōt low-RAP conventions; kein karuo, wāween ko rejjab jejjet ñan wōnāān RAP — ilo jet jikin ko, joñan RAP ej ļapļo̧k jān aikuj eo an jikin eo im wōņāān ko rej wōtlo̧k ium̧win wōņāān eo an; kein kajilu, bōbrae jorrāān an ri-kōmman jerbal — jab alikar jerbal eo an high-RAP content ej tellok ri-kōmman jerbal ro ñan kōmman design ko rejimwe.

FHWA Standards: Technical Compliance Path ñan High-RAP Content

FHWA ear kwalok 'Asphalt Rejuvenators for High-RAP Mixtures' guide (FA HWA-NHI-16-011) ilo 2019, im ear letok juon ial in kōjparok kien ko ealikar ñan high-RAP recycling. Nan in rejañ ko relap rej: moktata, etale in rejuvenator ej aikuj in bedbed ion jerbal eo an im jab bedbed ion composition eo — ej lale an bitumen penetration elikin rejuvenation, jikin eo ej mōrā, ductility, im post-RTFOT performance; kein karuo, kōketak kōjerbal wāween ko an 'blending chart' ñan etale joñan an bitumen ekāāl im bar kōjerbale; kein kajilu, kōmeļeļeik mālijjon in mōjno im joñan bwil im molo edik an jerbal in kōmat ko kar bar kōjerbali; kein kajilu, kōketak kōjerbal warm-mix technology ñan kōmman bwe en diiklok joñan bwil im molo im jorran ko. Ñan ri wia ro jen ailiñ ko jet, bok in tel eo an FHWA ej jilkintok juon ennaan ealikar: maroñ in wiakake rejuvenator ko ej pedped wōt ioon melele ko kin jerbal ko air, jab ailiñ eo rej itok jen e. Rejuvenator eo jen FangService kar kōmmane kin aikuj ko an FHWA guide — 25°C viscosity in 280 mPa·s, flash point in 231°C, RTFOT viscosity ratio in 1.1, im RTFOT mass change in 0.9% — aolep rej tōpar joñan ko kar kōtmene kaki ilo FHWA guide eo.

US RAP Price Mechanisms: Etke High-Inclusion Regeneration ej laplok an emman ilo economy

US RAP price mechanism ej oktak jen Europe. Ilo US, wōnan RAP ko rej bedbed ion joñan an armij ro ilo jikin eo aikuj im jab jen joñan wōnan men ko rej bōk jikin. Ilo jikin ko ilo central im western (einwot Texas, California), RAP ej lap im wōnan emaron diklok jen $15-25 juon tonne — ilo ien eo fresh aggregate emaron in $40-60 juon tonne. Oktak in wōnan ej melelen bwe kōjerbal RAP ejjab baj kōjparok wōt wōnāān kein jerbal ko ak ej barāinwōt kōjparok wōnāān bōk im bōkļo̧k. Bar juon, wōnan bitumen ilo US ej $500-700 juon tonne, ilo ien eo wōnan bitumen eo etto ilo RAP ej lukkun diiklok jen wōnan eo. Kōjerbal juon rejuvenator ñan kōkōmanmanlok RAP jen 30% ñan 60% ej kōjparok enañin 30-40 kg in bitumen ekãl ilo juon tonne in mixture, ej ukōte ñan enañin $15-28 juon tonne ilo savings ilo wōnan ko kiõ. Ñan juon jerbal in 100,000-tonne, men in make ej kōjparok $1.5-2.8 million ilo wōnan bitumen.

Field Case: Texas I-35 Highway Regeneration Project

Ilo juon jerbal in kōkmman ial ko relap ilo Texas I-35, Texas Department of Transportation (TxDOT) ear bōk juon high-RAP regeneration solution ippāñ 60% RAP content. Data ko relap: moktata, RAP ej jen asphalt surfacing eo kar likite 20 yio ko remootlok, kar kōmmane ikijen TxDOT's grading system; kein karuo, joñan rejuvenator eo ear 10% in bitumen eo ilo RAP eo, im post-rejuvenation penetration ear bar jeblak jen 25 dmm ñan 50 dmm (virgin bitumen ear 55 dmm); kein kajilu, joñan bwil im molo in kōmat eo ear dikļo k jen 175°C ñan 125°C, im kōmman bwe en diiklok an armij kajerbal fuel kin 30%; kein kajilu, joñan wōnan jerbal eo ear 32% diiklok jen hot-mix solution eo ekkā, ippāñ carbon credit revenue eo ear $500,000. Aorōkin case in ej bwe ej kwalok bwe ilo jukjuk in bed eo an US federal highways, high-RAP regeneration ejjab baj technically feasible ak barāinwōt economically advantage — TxDOT engineer ro rar kwalok bwe ñe carbon credit revenue im maintenance cycle extension savings rej bōk jikin ilo project finances, comprehensive cost ej 40% diklok jen wāween eo ekkā.

Pepe in wia: Ial eo ñan ri wia ro jen ailiñ ko jet ñan deloñ ilo wia eo an US

Ñan ri wiakake asphalt rejuvenator ro jen ailiñ ko jet rej kōnan deloñ ilo market eo an US, ial in bokake im ial in wia ko rej aikuj karōk ko rejimwe. Mokta, technical certification — kōmman technical documentation im test data ekkar ñan aikuj ko an AASHTO im FHWA, ippāñ test ko rej make jen laboratory ko rej bōk mālim jen US (einwot AASHTO Materials Verification Laboratories). Kein karuo, jikin jerbal ko ilo jikin eo — ejaak jerbal in jipan ibben ri wiakake asphalt ro ilo US ak ri leto letak ro ñan kajerbal ri wia ro air im maroñ ko air ilo logistics. Kein kajilu, jerbal in etale — jerbal ibben juon state DOT (einwot TxDOT ak Caltrans) ñan kadedelok juon jerbal in etale, kobaik melele ko jen US-local engineering im record in jerbal ko. Kein kajilu, bōk koņaan ilo industry association — kobalok ibben National Asphalt Pavement Association (NAPA) ak ASTM International ñan bōk koņaan ilo industry standard development im technical exchange. Elikin jiljino bun̄tōn kein, ri wia ro jen ailiñ ko jet rej maroñ in bōk koņaer ilo public bidding ilo US market. Melele eo elap ej bwe market eo an US ej 'technology-driven' — joñan wōt an kajoor data in performance, men ko jen ailiñ ko jet remaroñ in ikkure ibben brand ko ilo ailiñ eo. Ejjab einwot market eo an Europe, menin bōbrae ko ñan ri wia ro rejjab jokwe ilo US market eo edik. View the Asphalt Rejuvenator Supplier